Extensible rule



April 1 1924.

J. Y. ECKMAN EXTENSIBLE RULE Filed June '7, 1923 2 Sheets-Sheet 1 WZZi/ffjf.

P atented Apnl,

UNITED :srA'rEs some it. moment, or nmwnn, comma KTENSIBLE RULE.

Application filed June 7, 1928 Serial No; 848,881.

To all whom it may concern Be it known that I, JOIIN"Y. ECKMAN, a citizen of the United States, residing at Denver, in the county of Denver and State proved rule in a The said section tance of'Colorado, have invented certain new and useful Im rovements in Extensible Rules. of which t e following is a specification.

In carrying out the present invention, it is my purpose to provide a rule wherein the same may be extended for measuring disreater thanthe ordinary length of the ru e, the invention being further characterized'by the fact that the same may be employed as an ordinary rule, or maybe so changed as. to enable the device to be used as a square.

The primary object of the invention resides in the provision of such a rule that is extremel simple of construction and highly usefu of purpose, and one that may be manufactured and marketed at comparatively small cost.

A still further object is to provide a rule of the extensible type, wherein the same may be adjusted in a simple manner, and positively held in adjusted positions.

The nature. and advantages of the invention will be better understood when the following detailed description is read in con-' nection with the accompanying drawings, the invention residing in the construction, combination, and arrangement of parts as claimed.

In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherem:

Figure 1 is a top plan view of my impartlyextended position. Figure 2 is a side elevation thereof. Figure 3 is a detail cross section upon the line 3-3 of Figure 2.

Figure 4 is a view similar to Figure 1, with the sections comprising the rule so related as to provide a rule of the uare type. Figure 5 is a fragmentary en elevation of the rule when employed as a square, and

v Figure 6 is a fragmentarv cross section,

thereof.

-With particular reference to the drawings, my novel'rule comprises a main section 5 of any stantially rectangular shape in cross section.

5 is provided centrally with a longitudinal rectangular shaped slot 6 that termlnates at the; opposite ends of the believed by .most practical desirable length, and-of sub section. The top side of thesection fi is formed with a longitudinally extending slot 7 that is in communication with the: said. slot 6, this slot terminating at one end, at one end of the section and at its oppositeend,

at a point adjacent. the opposite end. of said section.

This section 5 is formed upon all of its sides with graduations 8 as well as indicating numerals 9 for obvious purposes.

Slidably positioned within the slot 6 is an extensible section 10, which is formedupon its opposite sides with graduations' as well as indicating marks as more. clearly shown in Figures 1, 4: and 6. Extending through said section 10 adjacent one end thereof is a headed'and screw threaded bolt 11, this bolt extending upwardly throughthe slot 7 in the section 5, and being equipped with a thumb nut and washer 12 and 13,"

respectively, whereby the section 10 may be held at adjusted positions with respect to the section 5.

At the end of the section 5 carrying the highest indicating numeral and atone side of the section, the same is 'formed with a cutout 14, whereby when the section 10 has been drawn outwardly of the section 5'at the limit of its movement, the same may be swung at right angles to the section 5 as shown in Figures 4, 5 and 6, for providing a rule of the square type. As a means for maintaining the section 10 in this right angular position with respect to the sectlon 5, the said section 5 is provided upon its side opposite the cut-out 14 with a steel spring 15 that is similar to the usualspring of a pen knife and functions in the same manner;

in view of the above description, it is me that numerous advantages of a rule of this character will be readily appreciated'by those skilled in the art, and even though I have herein set forth. the embodiment of the invention, it is nevertheless to be understood that minor changes may be made therein, without departing invention as claimed.

Having thus described my invention, I claim as new, ters Patent, is: v

In a rule of the class described, a main section formed centrally with a longitudinally extending T-slot, the leg portion of said slot opening into one face of said section and being of a length less than the what and desire to secure by'Let length of the section and terminating adjacent one end thereof, a secondary section slidable within the head ortion of the slot of the said first anentione section, means for maintaining said ,last mentioned section at adjusted positions within said first mentioned section, the main section of said rule being provided at the end in which the last mentioned-slot terminates and at an adjacent face thereof with a. notch, said notch communicating with and extending longi- Leeaeae 

